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Magnetohydrodynamic Kelvin-Helmholtz instabilities in astrophysics. 4. Single shear layer in MHD flows

Journal Article:

Abstract

In this further paper on the physics of Kelvin-Helmholtz instabilities the case in which the fluids in relative motion are magnetized and separated by a shear layer is investigated. The present study points out, with respect to previous treatments, that different velocity profiles affect perturbations of short wavelength (as compared to the scale of the shear). Another new result is in the destabilizing effect, even in the subsonic regime, of the magnetic field on modes neutrally stable in the vortex sheet approximation. Such a behaviour is analogous to that found in the fluid case for Mach numbers >approx. = to 2. Possible astrophysical implications are also discussed.
Authors:
Publication Date:
Nov 01, 1983
Product Type:
Journal Article
Reference Number:
AIX-15-029648; EDB-84-087293
Resource Relation:
Journal Name: Mon. Not. R. Astron. Soc.; (United Kingdom); Journal Volume: 205:2
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ASTROPHYSICS; HELMHOLTZ INSTABILITY; BOUNDARY LAYERS; FLUID FLOW; MAGNETOHYDRODYNAMICS; SHEAR; FLUID MECHANICS; HYDRODYNAMICS; INSTABILITY; LAYERS; MECHANICS; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; 640100* - Astrophysics & Cosmology
OSTI ID:
7132184
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: MNRAA
Submitting Site:
HEDB
Size:
Pages: 515-524
Announcement Date:

Journal Article:

Citation Formats

Ferrari, A, Turin Univ. (Italy). Ist. di Fisica Generale), Trussoni, E, and Max-Planck-Institut fuer Physik und Astrophysik, Garching (Germany, F.R.). Inst. fuer Extraterrestrische Physik). Magnetohydrodynamic Kelvin-Helmholtz instabilities in astrophysics. 4. Single shear layer in MHD flows. United Kingdom: N. p., 1983. Web.
Ferrari, A, Turin Univ. (Italy). Ist. di Fisica Generale), Trussoni, E, & Max-Planck-Institut fuer Physik und Astrophysik, Garching (Germany, F.R.). Inst. fuer Extraterrestrische Physik). Magnetohydrodynamic Kelvin-Helmholtz instabilities in astrophysics. 4. Single shear layer in MHD flows. United Kingdom.
Ferrari, A, Turin Univ. (Italy). Ist. di Fisica Generale), Trussoni, E, and Max-Planck-Institut fuer Physik und Astrophysik, Garching (Germany, F.R.). Inst. fuer Extraterrestrische Physik). 1983. "Magnetohydrodynamic Kelvin-Helmholtz instabilities in astrophysics. 4. Single shear layer in MHD flows." United Kingdom.
@misc{etde_7132184,
title = {Magnetohydrodynamic Kelvin-Helmholtz instabilities in astrophysics. 4. Single shear layer in MHD flows}
author = {Ferrari, A, Turin Univ. (Italy). Ist. di Fisica Generale), Trussoni, E, and Max-Planck-Institut fuer Physik und Astrophysik, Garching (Germany, F.R.). Inst. fuer Extraterrestrische Physik)}
abstractNote = {In this further paper on the physics of Kelvin-Helmholtz instabilities the case in which the fluids in relative motion are magnetized and separated by a shear layer is investigated. The present study points out, with respect to previous treatments, that different velocity profiles affect perturbations of short wavelength (as compared to the scale of the shear). Another new result is in the destabilizing effect, even in the subsonic regime, of the magnetic field on modes neutrally stable in the vortex sheet approximation. Such a behaviour is analogous to that found in the fluid case for Mach numbers >approx. = to 2. Possible astrophysical implications are also discussed.}
journal = {Mon. Not. R. Astron. Soc.; (United Kingdom)}
volume = {205:2}
journal type = {AC}
place = {United Kingdom}
year = {1983}
month = {Nov}
}